Primer application is a challenge in many industries. They’re distinguished between water-based primers and solvent based primers. Axel Wirth Maschinen GmbH offers different solutions for those types of primer.
1. Water-based primer:
Application of the primer, using a dosing roller machine type DWO. The primer is being pumped into the rollers and circulates within the machine. When using the machine in hot environments, the viscosity can be measured and automatically adapted. Rubber coated rollers, are being used for that, which can be smooth, grooved or porous, depending on the desired application amount. Following that, a infra-red dryer can be patched in. Our machines are currently being used with the following water-based applications in the
2. Solvent-based Primer:
Using solvent based primers will become necessary in different fields. Challenges resulting from that were mastered by us multiple times in the past. Following things need to be considered:
Explosion protection of the plant, or EX-protection of roller coating machines in short. The solvent-based primers usually have an extremely low flashpoint, that makes the usage of EX-protected motors, sensors, circuitry, etc. necessary. We can assure this also in cooperation with specialized audit companies. This of course does have it’s price, but sometimes it’s not possible otherwise.
Die lösemittelhaltigen Primer haben in der Regel einen extrem niedrigen Flammpunkt, der den Einsatz von EX-geschützten Motoren, Sensoren, Schaltung.... nötig macht. Dies können wir auch in Zusammenarbeit mit Prüfgesellschaften sicherstellen. Das Ganze hat seinen Preis, aber manchmal geht es nicht anders.
Keeping the viscosity stable. As additional point, it needs to be considered, that the solvents volatilize and thus the viscosity will change. That’s why it’s mandatory to monitor the viscosity and to adapt it with the addition of solvent. Otherwise you take the risk of the application amount changing through the change in viscosity.
Solvent-based primers and the rubber coating of rollers.Depending on the producer of the primer and the type of primer, the mixture of the solvents are a challenge for the rubber mixtures of the roller coaters. We always examine the compatibility of the rubber mixtures and the used primers in advance. Currently we got over 80 different rubber mixtures in use, so mostly a existing rubber can be found for the different types of primer.
Areas of application:
To verify if we can offer the right solution for your primer application, a test in our technical center is an important step.
Should we have sparked your interest, please get into contact with us and arrange a testing day at our place in Oberkochen.
Under conditional general conditions, cold PU adhesives, glue spreaders, 1KPU, 2KPU, roller application by glue spreaders or roller application can be rolled on with repeat accuracy.
The rollers can be removed for cleaning and can be made chemically resistant to the cleaners. With a rubber selection based on six different basic rubber types, our team will find the right rubber for cold PU adhesives and their cleaners.
In addition to the basic rubber types, we have well over 100 different roller surfaces in use with customers.
Due to the variety of roller surfaces and the adjustment possibilities on the machines, application weights of 5 - 800 g/m² are possible.
The glue application machines from Wirth are very easy to dismantle and clean. This is especially advantageous for PU adhesives.
The main parts of the machine are made of stainless steel and therefore insensitive.
The following machines are frequently used for these adhesives:
Glue application machine Typ LW 100
or
Glue application machineTyp LW 120
or
The following can be processed 1KPU or also 2KPU Adhesives.
Connections are for example:
is characterised by precise work with demanding adhesives, glues and adhesives.
The wealth of experience grows from day to day. In addition to regular tests at our company, a large number of machines are also running in the laboratories of glue manufacturers.
Suitable for applying cold PU adhesives are the machine types LW 100 and LW 120 or the dosing roller machine type DWO 120.
Every customer can take advantage of the opportunity to test the glue spreader with their own PU glue at our premises in Oberkochen.
In our Demonstration room or test workshop sample productions can be manufactured and tested close to reality.
Thus, every customer can see and test the steps of mixing, applying and cleaning. Likewise, different application quantities with different roller surfaces can be shown. The customer gets exactly what he has seen and tested in advance..
With a working width of up to 1500mm, materials are coated here quickly and reliably.
This surface line impressively shows how professional and economical the use of the Axel Wirth machines is.
